
print('{0}---{1}---{2}'.format(1,2,3))

str5='good good study'
list1=[5555]
list2=[4151]
list1.insert(2,66)
print(list1)
list3=[51,544,44,86,25]
list4=sorted(list3)
print(list4)
num =list4.pop()
print(num)